Detection of Gamma Rays with E > 100 MeV from BL Lacertae
The Astrophysical Journal American Astronomical Society 480:2 (1997) 562-567
A Search for TeV Counterparts to BATSE Gamma-Ray Bursts
The Astrophysical Journal American Astronomical Society 479:2 (1997) 859-867
Observations of gamma-ray sources at energies > 300 GeV
Astronomy and Astrophysics Supplement Series 120:4 (1996) 603-606
Abstract:
Results from recent observations with the Whipple Observatory gamma-ray telescope are reported; after the successful detection of Markarian (Mkn) 421 particular emphasis was put on the observation of nearby Bl Lacs. The Bl Lac, Mkn 501, which is similar to Mkn 421 in many ways, was detected for the first time as a gamma-ray source. Extensive coverage of Mkn 421 this season revealed unusual variability; one episode of intensity change in April, 1995 was measured with high statistical significance. Upper limits were found for a number of Bl Lacs with z < 0.1.Gamma-Ray Variability of the BL Lacertae Object Markarian 421
The Astrophysical Journal American Astronomical Society 472:1 (1996) l9-l12
Extremely rapid bursts of TeV photons from the active galaxy Markarian 421
Nature Springer Nature 383:6598 (1996) 319-320